Well, I guess it is that time of the month again (no pun intended at ALL). Disqus is performing scheduled maintenance, and some services might load fine and some might have issues.
A screenshot of their status page can be shown below. If you get Disqus 2012 loading issues, then this is most likely the problem.
Update:
The maintenance is over, and it lasted about 30 minutes. Here is the final notification.